public void MarkLongDistanceAndReplay() {
using (TestStringReader reader = new TestStringReader(1024*20)) {
TextBuffer charBuffer = new TextBuffer(reader);
char ch;
LineInfo position;
Assert.Equal(reader.ToString().Substring(0, 128), charBuffer.Read(128, out position));
int offset = 0;
for (int i = 128; i < 1024*16; i++) {
Assert.True(charBuffer.TryLookahead(ref offset, out ch));
Assert.Equal(reader[i], ch);
}
offset = 0;
for (int i = 128; i < 1024*8; i++) {
Assert.True(charBuffer.TryLookahead(ref offset, out ch));
Assert.Equal(reader[i], ch);
}
Assert.Equal(reader.ToString().Substring(128), charBuffer.Read(reader.Length-128, out position));
Assert.False(charBuffer.TryLookahead(0, out ch));
}
}
public void ReadAndRollback() {
using (TestStringReader reader = new TestStringReader(1024*20)) {
TextBuffer charBuffer = new TextBuffer(reader);
LineInfo position1;
Assert.Equal(reader.ToString().Substring(0, 1280), charBuffer.Read(1280, out position1));
Assert.Equal(charBuffer.Position, 1280);
charBuffer.Rollback();
Assert.Equal(charBuffer.Position, 0);
LineInfo position2;
Assert.Equal(reader.ToString().Substring(0, 1280), charBuffer.Read(1280, out position2));
Assert.Equal(position1, position2);
}
}